TabView Release Notes

** version 2.3.0 ***
* no longer firing tabChange if already selected
* multiple clicks no longer trigger extra xhr if in progress
* now using existing href for Tab href attribute
* CLASSNAME now added if not present on tabview element

*** version 2.2.2 ***

* no change


*** version 2.2.1 ***

* no change

*** version 2.2.0 ***

* Element broken out into seperate pkg
  NOTE: new dependency required - element-beta.js

*** version 0.12.2 ***

* var Tab is now private
* fixed Element.configureAttribute

*** version 0.12.1 ***

* tabs.css renamed to tabview.css
* calls to "set" now queued so they can be made before "contentReady"


*** version 0.12.0 ***

* TabView widget introduced

* Note: border_tabs.css included as basic skin to enable "tabs" look
